Incandescent mantle fittings



' March 15, 1966 INCANDESCENT MANTLE FITTINGS Filed Feb. 18, 1963 4 Sheets-Sheet 1 INV$IV Tell HUGH cnmues HEB/RD 5;, a MWV3-+6M H. c. HEBARD 3,240,036

March 15, 1966 c, HEBARD 3,240,036

INCANDESCENT MANTLE FITTINGS Filed Feb. 18, 1963 4 Sheets-Sheet 2 NVENTOIL HUGH CHARL as HEBHRD 6- hm Baa-WM March 15, 1966 H. c. HEBARD INCANDESCENT MANTLE FITTINGS 4 Sheets-Sheet 3 Filed Feb. 18, 1965 I Irwin 1 R I H UGH C RARLES H'EBHKU 1- 3 (xi 1 3mm March 15, 1966 c, HEBARD 3,240,036

INGANDESCENT MANTLE FITTINGS Filed Feb. 18, 1963 4 Sheets-Sheet 4 l l I l 'LNL I W WW I I swim 70 24 lli l L-J lli ILLIM 22 INVENTOR Hug/2 Char/e6 hebaral BY $6M ATTORNEYS United States Patent 3,240,036 INCANDESCENT MANTLE FITTINGS Hugh C. Hehard, High Wycomhe, England, assignor to Aladdin Industries Limited, Greenford, England, a British company Filed Feb. 18, 1963, Ser. No. 259,175 Claims priority, application Great Britain, Feb. 26, 1962, 7,417/ 62 Claims. (Cl. 67--38) This invention relates to incandescent mantle fittings and to the kind which, together with an upright mantle, constitutes a unitary article capable of being mounted as such above a burner of the blue flame annular wick type.

The primary object of the invention is to provide a new or improved mantle fitting adapted to cooperate with burners of different sizes and shapes while yet being relatively simple and cheap to manufacture.

According to one aspect of the invention there is provided an incandescent mantle fitting comprising a basal ring, having an inner annular wall formed to cooperate with a first type of burner, and an outer annular wall divided into segments presenting alternate outwardly and downwardly direction portions respectively formed to cooperate with a second and a third type of burner.

According to a further aspect of the invention there is provided an incandescent mantle fitting comprising a basal ring formed to cooperate with one of more types of burner, a wire loop to support the mantle, and a guard ring to protect the mantle, the guard ring being secured to extensions of the basal ring and the wire loop being clinched in ears formed from the guard ring.

In order to explain a preferred embodiment of the invention more clearly, reference will now be made to Us. Letters Patent No. 2,755,649 and FIGS. 1 and 2 of the accompanying drawings.

FIGURE 1 is an elevation showing in section a mantle fitting according to a preferred embodiment of the invention, combined with one form of burner;

FIGURE 2 is a top plan view of the burner structure of FIGURE 1;

FIGURE 3 is a section through the mantle fitting of FIGURE 1, but taken along a plane at right angles to that of FIGURE 1;

FIGURE 4 is a top plan view of the mantle fitting of FIGURE 1;

FIGURE 5 is a substantially perspective view showing the detailed structure of the mantle fitting of FIGURE 1;

FIGURE 6 is a fragmentary section showing how the mantle fitting of FIGURE 1 cooperates with a second type of burner; and

FIGURE 7 is a fragmentary section showing how the mantle fitting of FIGURE 1 cooperates with a third type of burner.

In FIGURES 1 and 2 of US. Letters Patent No. 2,755,649 there is shown a mantle fitting capable of cooperating with a first type of burner (burner A) shown in FIGURES 3 and 4 of that patent or with a second type (burner B) shown in FIGURE 5 of that patent. In FIGURES 1 and 2 of the drawings accompanying the present specification, there is shown the upper portion of a third type of burner (burner C). A mantle fitting capable of cooperating with burner C is shown in FIG- URES 1 and 2 of US Letters Patent No. 2,745,272.

In accordance with this embodiment of the invention there is provided a single mantle fitting capable of cooperating with burner A, B or C.

This mantle fitting is shown in FIGURES 3 and 4 of the accompanying drawings and comprises a basal ring 1 provided with an inner annular wall 2 formed with outwardly directed tongues 3 to cooperate with the inwardly directed flanges 16 of the upper cone termination of burner A as shown in FIGURE 6 herein which illustrates mounting of the mantle fitting of FIGURES 1 and 5 herein on the burner of FIGURES 3 and 4 of said Patent No. 2,755,649. The basal ring is also provided with an outer annular wall 4 having a pair of outwardly directed segmented flanges 5 adapted to cooperate with the inwardly directed tongues 21 formed from the upper cone termination of burner B as shown in FIGURE 7 herein which illustrates mounting of the mantle fitting of FIG- URES 1 and 5 herein on the burner of FIGURE 5 of said Patent No. 2,755,649 wherein said tongues are mounted on an inwardly directed flange 22 on burner wall 24. Disposed between and alternating with the segmental flanges 5 are diametrically opposed downwardly extending shouldered flanges 6 adapted to cooperate with inwardly projecting flanges 1 1 formed from the upper cone termination of burner C as shown in FIGURE 1 herein.

The downwardly extending flanges 6 pass down inside the opening at the top of the cone of burner C but pass down outside the top of the cones of burners A and B. In order to permit this, it has been found necessary to make the basal ring of very fine gauge metal, say 0.01 inch instead of the more usual 0.015 inch. In accordance with normal practice as shown in FIGURE 1 of said Patent No. 2,755,649 the mantle fitting of the present invention is provided with a wire loop or harp 7 (of which only the bottom portion is shown in the drawings) for suspending the mantle and one method of securing the lower ends of the wire in position is to form ears from an extension of the basal ring and clinch these ears around the wire.

While it is desired to use a similar method of securing the wire in the present mounting it has been found that a satisfactory clinch cannot be obtained owing to the thinness of the fine gauge metal referred to. As in said Patent No. 2,755,649 it is desired to fit a guard ring around the base of the mantle to prevent damage thereto and in accordance with an important .feature of the present invention, the ears for clinching the wire are formed from the guard ring and the latter is in turn secured to extensions of the basal ring. In FIGURES 1, 3, 4 and 5, the guard ring is shown at 8 and the ears for the ends of the wires are shown at 9. The extensions of the basal ring are indicated at 10. Since the guard ring 8 is separate from the basal ring 1 is can be made of thicker gauge material than the latter so providing a prolper thickness for the ears 9 to be clinched, say 0.015 inc In accordance with a further feature of the invention, the securing of the guard ring 8 to the basal ring 1 and the clinching of the ears 9 around the wire ends 7 is done in a single operation. For this purpose the extensions 10 of the basal ring are formed with lateral tabs or tongues 12 adapted to be turned up and over extensions 13 on the guard ring. Since the latter extensions are integral with the ears 9 it will be apparent that a single pressing operation in a plane perpendicular to the radius of the guard ring can be effective firstly to turn over the tabs 12 and secondlly to clinch the ears 9 around the wire ends 7.

I claim:

1. An incandescent mantle fitting for mounting above fuel burners comprising a basal ring having an innner anular wall and an outer annular wall, in which the inner annular wall is provided with outwardly directed tongues adapted to cooperate with inwardly directed flanges formed from the upper cone termination of a first type of burner, and in which the outer annular wall is provided with a pair of outwardly directed segmental flanges adapted to cooperate with inwardly directed tongues formed from the upper cone termination of a secnd type of burner, together with a pair of downwardly extending shouldered flanges on said outer annular wall alternating with the outwardly directed flanges formed to cooperate with inwardly projecting flanges formed from the upper cone termination of a third type of burner.

2. An incandescent mantle fitting as recited in claim 1, comprising a wine loop adapted for supporting a mantle, a guard ring adapted for protecting a mantle, radial extensions on said guard ring, outward extensions on said basal ring, means securing the guard ring to said extensions of the basal ring, ears integrally formed on said guard ring means clinching the wire loop in said ears formed on the guard ring, and lateral tabs on the extensions of the basal ring, said lateral tabs being adapted to be turned up and over said radial extensions on the guard ring, which radial extensions are formed integrally with the ears for receiving the wire loop.

3. An incandescent mantle fitting comprising a sheet metal basal ring provided with means for removable attachment to the upper part of a fuel burner assembly, a sheet metal guard ring for protecting the lower end of a mantle mounted on said basal ring, means for mounting the lower ends of a wire loop from which said mantle is supported on said basal ring comprising integral ears on said guard ring clinched about said lower ends of said loop and means securing said guard ring upon said basal ring.

4. In the incandescent fitting defined in claim 3, said means for securing the guard ring to the basal ring comprising a portion of said guard ring seated on said basal ring and at least one tab on said basal ring bent up and over said guard ring portion.

5. In the incandescent fitting defined in claim 3, said guard ring being of sheet metal thicker and stiffer than said basal ring.

References Cited by the Examiner UNITED STATES PATENTS 2,128,638 8/1938 Davis 67-l01 2,653,464 9/195 Brarnming 6710l 2,745,272 5/1956 Bra-mming 6710l 2,755,649 7/1956 Imber 6710l FOREIGN PATENTS 341,507 1931 Great Britain.

EDWARD 1. MICHAEL, Primary Examiner.

PERCY L. PAT-RICK, Examiner. 

3. AN INCANDESCENT MANTLE FITTING COMPRISIG A SHEET METAL BASAL RING PROVIDED WITH MEANS FOR REMOVABLE ATTACHMENT TO THE UPPER PART OF A FUEL BURNER ASSEMBLY, A SHEET METAL GUARD RING FOR PROTECTING THE LOWER END OF A MANTLE MOUNTED ON SAID BASAL RING, MEANS FOR MOUNTING THE LOWER ENDS OF A WIRE LOOP FROM WHICH SAID MANTLE IS SUPPORTED ON SAID BASAL RING COMPRISING ENTEGRAL EARS ON SAID GUARD RING CLINCHED ABOUT SAID LOWER ENDS OF SAID LOOP AND MEANS SECURING SAID GUARD RING UPON SAID BASAL RING. 